Lock for pianos



UNITED STATES PATENT OFFICE,

E. L. GAYLORD, 0F TERRYVILLE, CONNECTICUT. l*

LocK Foa PIANos.

Specification forming part of Letters Patent No. 49,l00, dated August 1,1865.'

To alt whom it may concern:

Be it known that I, E. L. GAYLORD, of'Ierryville,l in the county ofLitchfield and State of Connecticut, have invented a new and Im provedLock; and I do hereby declare that the A and articles generally havinghinged lids.

The invention consists in the employment or use of two bolts ofsegmentform, provided with Shanks and connected with a tumbler in such amanner that the bolts will, as the tumbler is operated through themedium of a key, work in the path of a circle in and out from -thelock-case, in order to lock or unlock the article to which the lock isapplied.

A represents the case of the lock, which may be of rectangular or otherproper form, and fitted in a mortise in the article, to which the lockis to be applied.

B B represent two bolts of segment forni, Which are provided withstraight shanks C C', connected at their ends and secured within thecase A by a pivot, a. The bolts B B work from the pivot a as a center,and consequently move in the path of a circle of which the pivot a isthe center, and in this movement work into and out from the lock-casethrough openings b in its upper edge, as will be fully understood byreferring to Fig. l.

The bolt B has its shank C prolonged and bent about at right angles toits main portion to form an arm, c, which is provided` with a l pin, d,near its end, said pin being tted in a i. short curved slot, e, in atumbler, D, which is l provided near its lower end with a hollow hub, f,

the ends of which are fitted in the sides of the case A, the interiorofthe hub heilig square to receive a key by which the tumbler is'turned.

Besides the short curved slot c, the tumbler t has a long slot, g, madeinit nearly straight,

the outer end being curved downward, and in this slot a pin, h, istted,said pin being'at the outer end of an arm, t', which projects atright t angles from the shank C ofthe bolt B. (See Fig. l.)

Thetwo bolts are operated by means the tumbler D thus connected to them.By turningthe tumbler to the right the bolts B B will be drawn t withinthe caseA, as shown in red, and by turnt in g the tumbler to the leftthe bolts will be forced out from the lock-case, as shown in black. Thebolts, when shoved or moved out from the lock case, pass throughopenings]- in a metal plate, E, secured to the lid ot the article towhich the lock is applied.

Thus by this simple arrangement a very eili` cient and durable lock isobtained for the purpose specified, one not liable to get out of repairor become deranged by use.

I would remark that the tumbler D is retained in its two diti'erentpositions by a spring, G.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The two segmentbolts arranged so as to Work from acommon center, and operated through` the medium ot the tumbler connectedwith them, substantially in the manneras'and for the purpose herein setforth.

E. L. GAYLORD. Witnesses:

HENRY A'rWA'rER, ALEXANDER POND.

